cab signal

cab signal (plural cab signals)

1. (rail transport) A device in the cab of a locomotive or train which displays the status of signals along the track.
   • 1961 June, J. Geoffrey Todd, “Impressions of railroading in the United States”, in Trains Illustrated, page 357:

     As we sped effortlessly along at a steady 75-80 m.p.h., with the three vertical lights of a clear aspect shining unwinkingly on the ground glass of the cab signal, our engineer lolled back in his chair and leisurely lit a huge cigar; [...].

• cab signalling

• “cab signal”, in Merriam-Webster Online Dictionary, Springfield, Mass.: Merriam-Webster, 1996–present.